Inspect a TLS certificate

Enter a hostname. Tlscheck connects to port 443 and reads the certificate chain the server presents.

Hosts behind Cloudflare cannot be checked from here. The tool connects to a single hostname — it does not scan subdomains or networks.

This tool answers when you ask it. No alerts, no reminders, no scheduled re-checks. Nothing is stored.

Behind Cloudflare. The certificate presented belongs to Cloudflare's edge, not the origin server. Results below reflect Cloudflare's edge certificate. This tool cannot reach the origin through Cloudflare.

Enter a hostname above and click Inspect to see the TLS certificate details for that server.